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color tests for wodo white, cone 6, oxidation.

updated fri 16 mar 01


Alisa og Claus Clausen on thu 15 mar 01

Color test for WoDo White, cone 6, oxidation.
Tested on light, iron flecked, mid-range stoneware, fired to 1215c, soak =
30 minutes, oxidation.

Base Receipe, adapted from Tony Martens ToDo white.
50 Neph. Syenite
25 Dolomite
5.8 Wollastonite
20 Ball Clay

All tests resulted in a matt glaze with a waxy feel. Stable and iron =
flecks showed clearly through. Oxides are in precents to 100 gram =
batches of base.

1 Cobalt oxide
light lilac

2 Cobalt oxide
deeper lilac

1 Cobalt oxide, 5 Rutile
Mottle medium green with light brown throughout.

2 Cobalt oxide, 5 Rutile
This glaze test is matt, but it sparkles. Color is same as abouve but =
slightly more fluid and a small amount of streaking.

1 Cobalt oxide, 1 Tin oxide
Greyish blue to toast brown base with some higher white areas.

2 Cobalt oxide, 1 Tin oxide
Light brown ground with high spots of lilac and grey blue edges.

1 Cobalt oxide, 5 Tin oxide
Light grey to blue ground with lilac streaking where thickest.

2 Cobalt, 5 Tin oxide

1 Cobalt oxide, 10 Zircon
Matt, matt, matt light lilac with light blue streaking where thickest.

2 Colbalt oxide, 10 Zircon
Very close to above with a more greyish blue ground under lilac where =

1 Cobalt oxide, 1 tin oxide, 5 Rutile
This was matt, but fluid. Contradiciton? Toasty brown ground with =
streaking greys and lilacs throughout.

1 Copper oxide, 1 Cobalt oxide
Pale pink/lilac with some darker lilac where thickest.

1 Copper oxide, 1 Cobalt oxide, 5 rutile
Greenish where thickest, browner where thinner. Some lilac nuances =

I am satisfied on a coloring and surface basis with these tests. Since =
I am mostly to matts and semi matts, these tests provided colors and =
surface that I personally like. The greens were of particular interest =
and the lilacs are very pallatable in small doses.

The overall feel of this glaze is very smooth and waxy. This is a =
Dolomite base I adapted to use with Wollastonite instead of Whiting. =
The substitution proves to be a very covering, good to feel glaze. =20

It should be noted that I use the word "stable" to mean stayed where I =
put the glaze. I would like to hear from Glaze gurus if this base is =
stable according to your criterias for a stable (OK to use) glaze. Any =
improvements would be appreciated because I like the surface texture of =
this glaze very much.

Best regards,
Alisa in Denmark